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1 Acta Neurobiologiae Experimentalis

1 1996

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Difluoromethylornithine counteracts lesion-induced astrogliosis in rat hippocampus: enhancement of inhibitory effect by combined treatment with GM1 ganglioside

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Jaglinski W. , Skup M. , Zaremba M. , Oderfeld-Nowak B.

Acta Neurobiologiae Experimentalis

1996

tom 56

nr 2

549-553

The effect of difluoromethylornithine (DFMO), an irrevesible inhibitor of ornithine decarboxylase (ODC), the rate limiting enzyme of polyamine biosynthesis, and its combined action with GM1 ganglioside, was studied on the GFAP content in a model of remote astrogliosis evoked in the hippocampus by latral fimbria transection.DFMO markedly suppressed hipocampal gliosis as measured by GFAP immunoblotting seven days postsurgery.Combined treatment with DFMO and GM1 ganglioside produced a stronger suppressive effect than DFMO.The results support the hypothesis of a causal link between lesion induced events:polyamine biosynthesis and astroglial reaction.Potentation of the inhibitory effect of DFMO by GM1 ganglioside suggest that the latter does not act through the mechanism involving ODC suppression.